Search for high-mass exclusive diphoton production with tagged protons in proton-proton collisions at <math display="inline"><msqrt><mi>s</mi></msqrt><mo>=</mo><mn>13</mn><mtext> </mtext><mtext> </mtext><mi>TeV</mi></math>

Benecke, Anna;Bruno, Giacomo;Bury, Florian;Caputo, Claudio;Bethani, Agni;et.al.
(2024) Physical review D — Vol. 110 (2024)

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Authors
  • Benecke, AnnaUCLouvain
    Author
  • Bruno, GiacomoUCLouvain
    Author
  • Bury, FlorianUCLouvain
    Author
  • Caputo, ClaudioUCLouvain
    Author
  • David, PieterUCLouvain
    Author
  • Delaere, Christopheorcid-logoUCLouvain
    Author
  • Donertas, Izzeddin SuatUCLouvain
    Author
  • Giammanco, AndreaUCLouvain
    Author
  • Jaffel, KhawlaUCLouvain
    Author
  • Jain, SandhyaUCLouvain
    Author
  • Jain, SandhyaUCLouvain
    Author
  • Lemaitre, VincentUCLouvain
    Author
  • Mondal, KuntalUCLouvain
    Author
  • Taliercio, AngelaUCLouvain
    Author
  • Tran, Tu ThongUCLouvain
    Author
  • Vischia, PietroUCLouvain
    Author
  • Wertz, SébastienUCLouvain
    Author
  • Bethani, Agniorcid-logoUCLouvain
    Author
  • et. al.
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Abstract
A search is presented for high-mass exclusive diphoton production via photon-photon fusion in proton-proton collisions at <math display="inline"><msqrt><mi>s</mi></msqrt><mo>=</mo><mn>13</mn><mtext> </mtext><mtext> </mtext><mi>TeV</mi></math> in events where both protons survive the interaction. The analysis utilizes data corresponding to an integrated luminosity of <math display="inline"><mn>103</mn><mtext> </mtext><mtext> </mtext><msup><mi>fb</mi><mrow><mo>-</mo><mn>1</mn></mrow></msup></math> collected in 2016–2018 with the central CMS detector and the CMS and TOTEM precision proton spectrometer (PPS). Events that have two photons with high transverse momenta (<math display="inline"><mrow><msubsup><mrow><mi>p</mi></mrow><mrow><mi mathvariant="normal">T</mi></mrow><mrow><mi>γ</mi></mrow></msubsup></mrow><mo>&gt;</mo><mn>100</mn><mtext> </mtext><mtext> </mtext><mi>GeV</mi></math>), back-to-back in azimuth, and with a large diphoton invariant mass (<math display="inline"><msub><mi>m</mi><mrow><mi>γ</mi><mi>γ</mi></mrow></msub><mo>&gt;</mo><mn>350</mn><mtext> </mtext><mtext> </mtext><mi>GeV</mi></math>) are selected. To remove the dominant inclusive diphoton backgrounds, the kinematic properties of the protons detected in PPS are required to match those of the central diphoton system. Only events having opposite-side forward protons detected with a fractional momentum loss between 0.035 and 0.15 (0.18) for the detectors on the negative (positive) side of CMS are considered. One exclusive diphoton candidate is observed for an expected background of 1.1 events. Limits at 95% confidence level are derived for the four-photon anomalous coupling parameters <math display="inline"><mrow><mo stretchy="false">|</mo><msub><mi>ζ</mi><mn>1</mn></msub><mo stretchy="false">|</mo></mrow><mo>&lt;</mo><mn>0.073</mn><mtext> </mtext><mtext> </mtext><msup><mi>TeV</mi><mrow><mo>-</mo><mn>4</mn></mrow></msup></math> and <math display="inline"><mrow><mo stretchy="false">|</mo><msub><mi>ζ</mi><mn>2</mn></msub><mo stretchy="false">|</mo></mrow><mo>&lt;</mo><mn>0.15</mn><mtext> </mtext><mtext> </mtext><msup><mi>TeV</mi><mrow><mo>-</mo><mn>4</mn></mrow></msup></math>, using an effective field theory. Additionally, upper limits are placed on the production of axionlike particles with coupling strength to photons <math display="inline"><msup><mi>f</mi><mrow><mo>-</mo><mn>1</mn></mrow></msup></math> that varies from <math display="inline"><mn>0.03</mn><mtext> </mtext><mtext> </mtext><msup><mi>TeV</mi><mrow><mo>-</mo><mn>1</mn></mrow></msup></math> to <math display="inline"><mn>1</mn><mtext> </mtext><mtext> </mtext><msup><mi>TeV</mi><mrow><mo>-</mo><mn>1</mn></mrow></msup></math> over the mass range from 500 to 2000 GeV.
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Benecke, A., Bruno, G., Bury, F., Caputo, C., David, P., Delaere, C., Donertas, I. S., Giammanco, A., Jaffel, K., Jain, S., Jain, S., Lemaitre, V., Mondal, K., Taliercio, A., Tran, T. T., Vischia, P., Wertz, S., TOTEM, CMS, et al. (2024). Search for high-mass exclusive diphoton production with tagged protons in proton-proton collisions at <math display=“inline”><msqrt><mi>s</mi></msqrt><mo>=</mo><mn>13</mn><mtext> </mtext><mtext> </mtext><mi>TeV</mi></math>. Physical review D, 110. https://doi.org/10.1103/PhysRevD.110.012010 (Original work published 2024)